Abstract: Technologies are generally described for end-suction pumps that are adapted for a dual inlet impeller. Example end suction pumps includes a body casing with a pump housing, a single inlet, a single outlet, and a magnetically coupled drive to effectuate drive to the impeller in the body casing. Fluid flows to one side of the impeller (e.g., a right-eye side) via a primary flow path from an impeller inlet of the body casing, and also to another side of the impeller (e.g., a left-side eye) via a secondary flow path through a stationary shaft with a semi-hollow hydraulic passageway therein.

Abstract: Various connection units are disclosed. The connection unit can be configured to straighten a flow of air, such as to reduce the distance before the flow of air becomes substantially laminar. The connection unit can include a drag reduction unit. The drag reduction unit can be configured to redirect airflow to the center of the connection unit. The connection unit can include a wake diverting component configured to lift air away from the periphery of the connection unit and/or redirect the airflow towards a radial center connection unit.

Abstract: Technologies are generally described for valve assemblies that include a valve body whose inner wall defines two ports and a controllable flow path that extends along the inner wall between the two ports of the valve body. Each port may be fitted with a corresponding gasket. A rotatable member disposed in the controllable flow path of the valve body may include a hemispherical-shaped body with a substantially flat disk-shaped surface portion, and a seal ridge formed about a perimeter of the substantially flat disk-shaped surface portion. During opening and closing operation, the seal ridge may be selectively engaged with either one of the gaskets reducing an initial contact surface, and thereby reducing friction between the rotatable member and the gaskets.

Abstract: There is provided a method of generating a control strategy based on at least three switching states of a matrix converter. The at least three switching states are selected based on at least a predicted output current, associated with each switching state, and a desired output current. In particular, mathematical transformations of a desired output current as well as output currents associated with each of a plurality of switching states are used to identify appropriate switching states.

Abstract: A Helmholtz resonator having a plurality of resonator chamber modules formed into an array. The array is configured to dampen sound. A module of the plurality of resonator chamber modules includes a first chamber and a second chamber. The first and second chambers have different lengths and are tuned to dampen different frequencies of sound.

Abstract: A motor assembly for driving a pump or rotary device features a power plane with a circular geometry to be mounted inside a space envelope having a similar circular geometry formed on an end-plate between an inner hub portion and a peripheral portion that extends circumferentially around the space envelope of the end-plate. The power plane is a multi-layer circuit board or assembly having: a power layer with higher temperature power modules for providing power to a motor, a control layer with lower temperature control electronics modules for controlling the power provided to the motor, and a thermal barrier and printed circuit board layer between the power layer and the control layer that provides electrical connection paths between the power modules of the power plane and the control electronics modules of the control layer, and also provides insulation between the power layer and the control layer.

Abstract: Apparatus and methods for supplying DC power to control circuitry of a matrix converter is provided. In certain embodiments, a matrix converter includes an array of switches having AC inputs for receiving a multi-phase AC input voltage and AC outputs for providing a multi-phase AC output voltage to a load, such as an electric motor. The matrix converter further includes control circuitry for opening or closing individual switches of the array, and a clamp circuit connected between the AC inputs and AC outputs of the array and operable to dissipate energy of the load in response to an overvoltage condition, such as an overvoltage condition arising during shutdown. The clamp circuit includes a switched mode power supply operable to generate a DC supply voltage for the control circuitry.

Abstract: A motor assembly for driving a pump or rotary device features a power plane with a circular geometry to be mounted inside a space envelope having a similar circular geometry formed on an end-plate between an inner hub portion and a peripheral portion that extends circumferentially around the space envelope of the end-plate. The power plane is a multi-layer circuit board or assembly having: a power layer with higher temperature power modules for providing power to a motor, a control layer with lower temperature control electronics modules for controlling the power provided to the motor, and a thermal barrier and printed circuit board layer between the power layer and the control layer that provides electrical connection paths between the power modules of the power plane and the control electronics modules of the control layer, and also provides insulation between the power layer and the control layer.

Abstract: Technologies are generally described for holding an impeller of a pump assembly in place axially with an impeller locking collar by loading the collar against a ring element. In a centrifugal pump assembly, one side of the shaft has a larger diameter for the impeller to abut against. The other side of the shaft may be fitted with an impeller locking collar comprising two portions that can be threaded together and hold the impeller in place by tightening against a ring element such as a split ring or spiral lock. Anti-rotation to avoid loosening of the impeller locking collar may be achieved by providing counter threads against a shaft rotation. Secondary anti-rotation may be provided by one or more set screws in the impeller locking collar.

Abstract: Technologies are described for dual motion shutoff valve assemblies. In various examples, valve assemblies include a sequencing drive mechanism and an eccentric shaft mechanism operable to linearly retract the valve disk from a gasket surface to effectively reduce scratching and friction of the gasket surface during valve opening and closing operations. In some examples, the sequencing drive may include two interlocking concentric driver rings, a retaining housing, and roller lock pins. Three guided pins of the sequencing drive may be configured to prevent the valve from rotating, while also causing the valve to retract linearly from the gasket surface via the eccentric shaft. Following retraction, an inner driver of the sequencing drive may allow the roller lock pins to move and lock the outer driver, which in turn may lock the valve disk to the shaft and rotate along with the shaft, which may be a single or dual shaft.

Abstract: Technologies are described for a bonnet assembly of a diaphragm valve. The bonnet assembly may comprise a handwheel. The bonnet assembly may comprise a housing. The housing may include a housing base. The housing base may include a top, a bottom, and four sides. Body stud heads of body studs of a body assembly may be in contact with an edge of the top of the housing base. The bonnet assembly may be configured to secure to the body assembly with the body stud heads at least partially exposed.

Abstract: Technologies are generally described for perimeter seated knife gate valve. Perimeter and transverse seals may be formed together as a single-piece or as two separate pieces. Wire-reinforced and with a rectangular cross section, the perimeter seal (portion) may fit into a corresponding groove in the single-piece body of the valve. Transverse seal (portion) may include two channels formed as side grooves or tubular channels to accept packing material, which energize the seal and are isolated from the fluid stream. In the two-piece version, a bottom groove of the transverse seal may be used to interlock both pieces. The shape and structure of the seal may allow single-piece valve body.

Abstract: A motor assembly for driving a pump or rotary device features a power plane with a circular geometry to be mounted inside a space envelope having a similar circular geometry formed on an end-plate between an inner hub portion and a peripheral portion that extends circumferentially around the space envelope of the end-plate. The power plane is a multi-layer circuit board or assembly having: a power layer with higher temperature power modules for providing power to a motor, a control layer with lower temperature control electronics modules for controlling the power provided to the motor, and a thermal barrier and printed circuit board layer between the power layer and the control layer that provides electrical connection paths between the power modules of the power plane and the control electronics modules of the control layer, and also provides insulation between the power layer and the control layer.

Abstract: A motor assembly for driving a pump or rotary device features a power plane with a circular geometry to be mounted inside a space envelope having a similar circular geometry formed on an end-plate between an inner hub portion and a peripheral portion that extends circumferentially around the space envelope of the end-plate. The power plane is a multi-layer circuit board or assembly having: a power layer with higher temperature power modules for providing power to a motor, a control layer with lower temperature control electronics modules for controlling the power provided to the motor, and a thermal barrier and printed circuit board layer between the power layer and the control layer that provides electrical connection paths between the power modules of the power plane and the control electronics modules of the control layer, and also provides insulation between the power layer and the control layer.

Abstract: The present invention provides wireless sensor technology seamlessly integrated into a pump system having a pump, a motor and a drive, has diagnostic and prognostic intelligence that utilizes sensor data, allows real-time condition monitoring; enables easy access to data and analytics via smart devices (i.e., smart phones and tablets); allows for easy remote monitoring (i.e., web portal) of the pump system; allows self-learning artificial intelligence (AI) built-in that adapts to changing conditions; and allows for smart pump system remote control. In operation, the present invention monitors the health and performance of the pump system that allows the user to get real-time data and intelligence virtually anywhere and anytime, as well as real-time diagnostics and prognostics, and also allows for smart control of the pump system remotely via smart device, and reduces downtime of equipment.

Abstract: Technologies are described for providing safe and clean air and to prevent interchange of fluids or particulates between people in social situations through two or more distinct airflows generated and/or directed by various structures. An air safety system may receive pre-sanitized air and push through a guidance structure to create a low-velocity, clean air safe zone that prevents exchange of fluids and particulates within the zone and a high speed air shield to prevent injection of fluids and particulates from outside into the safe zone. The system may accommodate one or more persons in an open space of over a table/desk. A modular air safety system may generate a similar safe zone and air shield horizontally in a smaller scale for one or more people.

Abstract: A cable splice assembly includes a tubing encapsulated cable, an electric submersible downhole cable, where the tubing encapsulated cable and the electric submersible downhole cable are tape-spliced through a pair of respective contacts, and a thermoplastic insulator to seal the tubing encapsulated cable. A shell contains the tape-spliced tubing encapsulated cable and the electric submersible downhole cable and multiple layers of sealant tape are wrapped around at least the tubing encapsulated cable and the thermoplastic insulator inside the shell, where a number of layers of the sealant tape is selected to create a pressure blocking seal inside the shell.

Abstract: Technologies are generally described for a vibration band alarm configuration tool to facilitate efficient and reliable setting configuration by displaying data and analyses pertaining to the data produced by a vibration transducer attached to a rotating machine and thereby reduces needed knowledge of machinery and vibration analysis. Various parameters and data sets may be calculated from the time domain waveform and displayed with collected data to simplify the recognition of features that represent system components and anomalies pertinent to the health of the rotating machine such as a pump assembly. Manually manipulatable controls on a graphic user interface may allow a user to set alarm bands and thresholds. Suggestions based on physical and/or statistical models, as well as, machine-specific historic data may be presented as well.

Abstract: A one or more plane, variable camshaft is described. The single plane camshaft includes a circular drive plate with two radial drive slots on opposing sides of the center, four arms movably coupled at respective endpoints and arranged in a polar configuration, and a scroll plate to allow adjustable operation of the camshaft. Multiple plane camshafts may include a number of half drive plates arranged around a drive block and secured to a base washer through a scroll block. The variable camshaft may be incorporated into portable, motorized or manual, bag valve mask based resuscitation devices or similar ones.

Abstract: Technologies are described for devices and methods to seal a diaphragm to a body exterior seal periphery. The methods may comprise rotating a handwheel of a bonnet assembly to move a load plate to apply a compression force to a top portion of a transition pressure ring. The top portion of the transition pressure ring may have a circular cross section. A bottom portion of the transition pressure ring may include a bead that may project out from a bottom surface of the bottom portion and may have a congruent shape and size as the body exterior seal periphery. The body exterior seal periphery may not be congruent to the circular cross section of the top portion. The compression force may press the bead against a diaphragm assembly and the diaphragm against the body exterior seal periphery, to seal the diaphragm to the body exterior seal periphery.